Your gallbladder is a pear-shaped organ under your liver. It stores bile, a fluid made by your liver to digest fat. As your stomach and intestines digest food, your gallbladder releases bile through a tube called the common bile duct. The duct connects your gallbladder and liver to your small intestine. Most people do not think about their gallbladder as all that important, however, if the organ malfunctions, it can cause serious problems. Gallbladder disorders are among the most common of all digestive system diseases.